Year	constant 2015 US$
1960	18296.99555934965
1961	18295.648641944168
1962	18162.09497356821
1963	18928.501248639444
1964	20157.73951816305
1965	20850.321390459816
1966	20850.94849276557
1967	21877.95088154395
1968	22392.21877902164
1969	23550.450523307834
1970	24809.583284459288
1971	24750.783188213605
1972	25084.37207625408
1973	25966.14888132731
1974	26671.814936115472
1975	26385.989068832063
1976	26494.726160660106
1977	27016.238098809477
1978	26590.95115729552
1979	27374.453840154994
1980	27956.37918600071
1981	28469.44183486213
1982	28855.34032653839
1983	27855.3598493104
1984	28674.7848871902
1985	29567.53884444373
1986	29860.830232854176
1987	29872.851576608595
1988	31469.756214679
1989	32668.6948848229
1990	33151.416803368294
1991	32295.584805886025
1992	32119.30729115961
1993	33050.89159540987
1994	33876.536370300004
1995	34793.25556771958
1996	35883.17432304783
1997	37174.56309327244
1998	38563.9042466001
1999	39701.48913296326
2000	41204.690192819384
2001	41681.695399515855
2002	43022.79765591232
2003	43929.8326918762
2004	45904.82598596527
2005	47120.45635727026
2006	48609.15603040274
2007	49936.0322917495
2008	51474.1009556757
2009	52440.13394170967
2010	52128.85692681966
2011	54667.271831779406
2012	56451.51007887526
2013	56054.27087649658
2014	56151.249179835686
2015	55600.029436990044
2016	54904.010695646335
2017	56615.793394146065
2018	57388.46689457338
2019	58386.68127489942
2020	58413.69487087344
2021	61609.07402250514
2022	63208.25489055761
2023	63230.52068878586